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/*
Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/ffmpeg_decoder.h
* @brief A decoder using FFmpeg to decode content.
*/
#include "util.h"
#include "decoder.h"
#include "ffmpeg.h"
extern "C" {
#include <libavcodec/avcodec.h>
}
#include <boost/thread/mutex.hpp>
#include <stdint.h>
class Log;
class VideoFilterGraph;
class FFmpegAudioStream;
class AudioBuffers;
namespace dcpomatic {
class Image;
}
struct ffmpeg_pts_offset_test;
/** @class FFmpegDecoder
* @brief A decoder using FFmpeg to decode content.
*/
class FFmpegDecoder : public FFmpeg, public Decoder
{
public:
FFmpegDecoder (std::shared_ptr<const Film> film, std::shared_ptr<const FFmpegContent>, bool fast);
bool pass () override;
void seek (dcpomatic::ContentTime time, bool) override;
private:
friend struct ::ffmpeg_pts_offset_test;
bool flush ();
static std::shared_ptr<AudioBuffers> deinterleave_audio (AVFrame* frame);
AVSampleFormat audio_sample_format (std::shared_ptr<FFmpegAudioStream> stream) const;
int bytes_per_audio_sample (std::shared_ptr<FFmpegAudioStream> stream) const;
std::shared_ptr<FFmpegAudioStream> audio_stream_from_index (int index) const;
void process_audio_frame (std::shared_ptr<FFmpegAudioStream> stream);
bool decode_and_process_video_packet (AVPacket* packet);
void decode_and_process_audio_packet (AVPacket* packet);
void decode_and_process_subtitle_packet (AVPacket* packet);
void process_bitmap_subtitle (AVSubtitleRect const * rect, dcpomatic::ContentTime from);
void process_ass_subtitle (std::string ass, dcpomatic::ContentTime from);
void maybe_add_subtitle ();
std::list<std::shared_ptr<VideoFilterGraph>> _filter_graphs;
boost::mutex _filter_graphs_mutex;
dcpomatic::ContentTime _pts_offset;
boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
/** true if we have a subtitle which has not had emit_stop called for it yet */
bool _have_current_subtitle = false;
std::shared_ptr<dcpomatic::Image> _black_image;
std::map<std::shared_ptr<FFmpegAudioStream>, boost::optional<dcpomatic::ContentTime>> _next_time;
};
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